Which of the following is not being considered as an energy source for the future?

Question

Quizplus · Accepted Answer

While carbon dioxide can be used as a feedstock for certain processes, such as carbon capture and utilization, it is not a direct energy source and therefore not being considered as a future energy source in the traditional sense. A, B, and C are all biofuels that are being considered as potential alternatives to fossil fuels, while D, shale oil, is a fossil fuel that is currently being extracted and used as an energy source.

Which of the Following Is Not Being Considered as an Energy